cruzcampo and a couple of others have picked up on a point that keeps twirling round my head. There seems to be a contingent who think "access for all" means "access for least able" and I think this is wrong. A right of way is not a guarantee that it will be easy and I suspect most participants in most pastimes relish the different challenges available to them. Sometimes I want an easy cruise with my family and other times I want a steep and technical challenge. I don't expect every ROW to be something my wife or kids will be able to do and this applies whether they're on foot, horseback, a bike or even a 4x4.
I'm not suggesting we go out and grade every bridleway, BOAT and RUPP like at a trail centre, climbing venue or ski resort, but presumably most of us shared trail users research the trails first to know what's going to be within our levels of ability. Sanitising all trails for the least able is not a path (pun intended) we should go down.
I'm all for shared use, trail maintenance and sustainability, but if we need to group together and fight the curse of wholesale trail sanitisation then show me where to sign up.